Furnace.



G. L. SGHUETZ.

FURNAGE.

' APPLIUAMON FILED .wx-5.1912.

Patented Aug. 12, 1913.

2 SHEETS-SHEET 2.

ibowm tov through the furnace on the line 3X .FEC

GODFBEY L. SCHUETZ. 0F ROCHESTER, NEW YORK.

FURNACE.

Specification of Letters Patent.

retenue Ang. i2, reis.

Application filed April 5, 1912. Serial No. 688,757.

To all 'whom t may concern:

Re it known that I, Gonuuur L. Sorrurrrz, citizen of the United States, residing at Rochester, .in the county of Monroe .and State of New York, have invented certain new and vuseful improvements in Furnaces, of which the following is a specification.

The object of my invention is to provide an'imsprovement in furnaces, such furnaces as are used for case hardening the steel rings uaedvfor bearing surfacesl in ball bearings, orfor case hardening any other steel parte;

Another object of my invention. is to pro vide a furnace that-Will secure an even distribution of heat on the parts that are to be heated and hardened.

Another object of my invention is to provide special facilities in the furnace for eX- posing theparts to be case hardened uniforinly to the heat from all direc-tions.

Another object of my invention is to provide .turn tables in the furnace, on which the parts to be case hardened can be rotated i and `exposed to the heat of the furnace.

Another object of my invention is to provide a yielding floor or false bottom in the furnace on which the highly heated pieces of steel may be handled With safety and freedom from distortion or warping.

iA-nother object of my invention is to provide .a chute at the end of the furnace through which the finished parts may conveniently pass without exposure to the air from the furnace to the Water tank Where they are chilled.

Another object of my invention is to construct the furnace so that the charge-'of pieces to be chilled may be introduced at one end and taken oiit at the other end.

Another object Iof my invention is to coni struct the furnace With turn tables therein driven by a pneumatic motor, the source of power of which is the compressed air which feeds the flame that heats the furnace. These and other objects of my invention will be fully illustrated in the drawings, described in the specification and pointed out in the claims at the end thereof.

In the accompanying draw-ings,- Figure 1 is a side elevation of my improved furnace. Fig. 2 is .a vertical longitudinal section throughfthe furnace on the line 2*-2* in Fig. 3. Fig. 3 is a vertical transverse section '3* in Fig. 4v is a perspective view partly Fig. 1.

broken away showing the general arrangement of the parts. Fig. 5 is ,a diagrammatic vIi-cwv of the piping that feeds the air blast tothe furnace andthe pneumatic motor. Fig. (3 is a perspective view of the pneumatic motor that vis used for driving` the turn tables of the furnace. y

My improved furnace is built on a base plate l which rests upon a table 2 of any improved construction. On top of the table 1 is placed a layer of fire brick 3. On top of this base is erected a furnace having the ends 4 and 5 .thereof formed of fire clay or lire brick and having the top 6 thereof also formed of fire clay or fire brick. The top G is supported by the side Walls 7 and 8, as shown in Fig. is covered by a metal shell 5), as is shown in cross section in Figs. 2 and 3. The top of the furnace is supported from this shell in any suitable or convenient manner.

Supported on the layer of ire brick 3 is a series of half round tiles 10, 10, on which is laid a layer of ire brick l1 Which constitutes the ioor of the furnace. The floor l1 Will be supported by the half round tiles which will yield thereunder to any sudden impact, thus making-the floor 11 somewhat elastic under a heavy impact.

At the right hand side of the furnace I place the charging door l2, which may be hin-.ged or mounted to slide in any suitable man-ner. On the opposit'eend of the furnace is placed the door 14 which is preferably hinged at the top, which door is provided with the sight openings 15, 15 Which are normally covered With swinging shutters, and with the sight opening 16 which is normally closed by a sheet of mica. This door is talso provided with an opening 17 through which a rod can. be introduced for the purpose of hand-ling parts of steel within the furnace that are being heated.

The door 14 is mounted on a hood or casing 18 which is bolted to thel furnace.v In

The outside of the furnace y :unl 4.3. by which lhe ein i iresael I Cri cups Q2 und between which cues :incl iurn tables is inlerpeserl :i lui'cr nl heul; insulnl ing substance, prelcrnbl :i shes-l es. The cups 22 und El :ire in lurn supporlcl b y lhe Shells 2l und 23, which hulle in lurn are supported in muy suil'nble muuner. Si molor il() is provided which coneiels preferably el two double enllell hhules set :il: un angle le euch other, nf: sheen in l( er?. il, ou bolli of which 'is blown :i :slreziin olE comprceseil nir, by which hc rolnlion ol`V lhe blurles mul lhe parte ronneelell lherelo is Secured. rVlie turn lnbles if!) und :3l ure reluml b y lhe motor.

(eulrnl of ille l'urnnre h1 prorieh'fcl openiuge 50, one ou euch ciale, lhroue'h which zuhnilell u bhul el :rr uml oil, by lhe burn :i1 ol which the furnace heeled. ,l`he lurnuce on euch shle i5 :ilse provided Willi (he Veni. openings nl lhe bulloni. lll, 3Q il` one einl uml .Hixnilur openingn ne the olher cnil, lhrough 'u hieli lhe proflucln ole ronlmslion nre leien from iluk l'iirunre :il lhe licor :nul discharged i'roni i'he wallholilhe fur .nace :it the lop l proi'ii'le for llie luruuce u swlem olE pip-- ini;` :is lollouw: rhe pipe Afl() e-rnineels, with some source ol'A ,eupply el eoniresnerl nir which is re ;ul;il,el by lhe l This pipe couneels with the llilrihuliufg' pipes i iir is conl reyeil lo the pneumnlic motor, ll. ale-o conneehs ivilh 'che llisliriburine pipes ll end l5 which convey ihe nir lhrough the burners in the iluruuee. lv'luilulile veli/es ure plncell in euch of heee distributing pipes lo regullile the llew elE :iir lhereihreugh, l also provide the pipe 50 which communicates with. lhe :iurce oil lhe supply of oil, unil through which the oil is; led lhrough the llielribuling pipes 31 lx1-ul 5i? to the burners. The eil and compressed nir come logehe :it the burners,

the oil being' :iloniizell by lhe compressed nir und he lwo ure blown verlicnlly inle he lfurnnee nggniusl: lhe roof where lhey ure burned, l'or the purpose ef healing the furnace, y

The operulinn el my improved l'urnnee is substantially :is follows: ',l'he valves controlling; the' nir :unl eil or other 'fuel ure opened und lhe burner vulves ire sel :unl the niixlure of nir :unl oil is blown vertically inlo l'he 'l'urnnre nguiust the ruof of it. llie blast ol' nir und oil is ignited by i piece of burning wusle unil :is it; begins to burn, it begins le heul'J the roof olf the furnace which in lurn increuees the cembusliou, causing (he oil lo be completely und quickly burned. 'lhe charging door l2 is opened and n slncl: ol ringeI or other parte lhzit nre te be ease hui-Jenni, in placed upon erich el' the lurn inl-leA Q() null 2l. The door is 'ilien clesed. ',lhe turn tubless nre then rotated, exposing lhe slncl: ol steel plates uniformly to cli heut of the furnace on all sides. Vilien the furnace hns been chnrged inlhie way the et ienclnnt will welch the opern'ien el the furnace through the sight opening 1G. '.l'he 'top plaire ol' euch of lhc sl'neke will heat the quickest', mul il, approaches n suilable teinpernlure for tempering, the ellenclant will llrnr: il, 'from the lop el lhe slack enel plnee it` on the lFloor of the furnace near the turn l'zible, unil :is ol'herisy n re also (lrnwn 'from the fuuck on lhe turn luhle to the floor eli n'e lurnzice, i'he plate er pluies previously clinn'n 'from the ehu-k will be advanced toward lle .loor Il. The operulor reaches; in lhreugh lhe opeuingre in the door with e hook for this purpose Aller sever-nl rninnl-ese2i posure lio ille heul' or" llie furnace, e'ne 0r more ol" the plaies will be ready for removal jfrom the. 'lurnnce :unl in that ense each plaie ne ils healing' le linie-heil1 will be drawn upon hereon, unl in this wey the operation of the l'urnnee nur y be carried en continuously.

llnving thus described my invention, what l clnim es new und pzitenlnhle is ne ollews: l. in n furnace, the conlbinntien of cesing lined wih refractory material, deurs :it oppoeile enfle lhereo, :L 'urn lzble in the hellem of Suhl casing neer one el said fleurs nml ineens for eonlinuenslifY relating," Seid turn luble, the lop of sani turn trible lying {lub-h with the bottom of lhe furnace, seid bulloni extending for :i eoi'isillernble distance from the lurn tables tothe door lit 'the op poeile end of the furnace.

l'n :i furnace, the combinnlion el? n, censinglineal with relrnel'oriif' material, one er more openings*y in the boltom of Sliiil casing. u, l-urn table mounlell lo rolnle in euch of snirl openings, und zi door adjacent le Seid turn table or turn lnblcs, the betteln of seid furnace exleniliug from Said turn table u, considerable ilisunee lo the opposite end of the -furnace und :i door ut lhe opposite end of the ful-nece, bolli of Suid doors being` rl-beve the floor.

3.. ',lhe coinbinntion in :L l'urunce of iifn elongated easing, n door .nl euch of` the op' vedges of the igoeegeee lli The Icombinationinaftn'nfaee having'a floor *therein* composed off refractory material, "of openings therein in which turn tables are" mounted'l to rotate, and `means for" continuously rotating;said turntables, said floor extending.' a; considerable distance on one side of'saidtumiables, adoor at each end of said furnace, and means for heating said furnace evenly throughout itslength.

55 In a-furnace; the combinationofa cas= ing'linecl f with refractory' material, la bottom in* said" casing,r aA turn" tableprojecting througlr'said'bottom at one 'end thereof, said bottom' extendingjfro-n said tum tableha distance substantially equal to or greater than the diameter of: the-turntable,` a door atteac'hencl of'saidcasing an opening-for delivering a blast vto said furnace' centrally of'l and transversely to said casing' and ventopenings" at' the ends offsaidy casing; ,(Llira heating furnace' the combination of a. furnaceY casuig having .a said floor having' centrally 'at theedfges and on oppositesides' thereof openings, means for blowing a combustible'mixture through said openings, said mixture burning" inside. of thelfurnace anclfliies forxdrawingo the product of"`conibustion' frein the furnace, said flues opening into the interiorvof the furnace through the sides at'thebottom of the furnace, the ventiia'tionof tlie'furnace for the purpose of combustion and-heating being\ confined-v to vsaid openiingsand4 said: flues.

7. ln a heating furnace Jthe combination of a furnace casing having a floor therein, said floor having centrally at the edges and on opposite sides thereof openings, means for blowing a combustible mixture through said openings, said mixture burning' inside of the furnace, hues for drawing olf 'the prod uct of combustion from the furnace, said lines opening into the interior of the furnace through the sides at the bottom of the furnace and a door at each end of the fur- -nace, the ventilation of the furnace for the purposes of combustion and heating being conned to said openings and said ues.

8. ln a furnace for heating, the combination of a casing lined with refractory material, a bottom in said casing, a'turn table projecting through said bottom at one end thereof, said bottom extending,l from said turn table toward the opposite end of the. furnace and affording a surface on vwhich the material to be heated in the furnace can rest for the final heating, and means for projecting a combustible through openings located at the opposite floor of the furnace approxi mately midway of its length.- l

9. ln a furnace for heatlng, the combination of a casing lined .with refractory material, a bottom in said casing, a turn table proiecting through said bottom et one enel floor' therein,

blast vertically thereof said bottoni-eXtending-fi'om said turnV table toufarcl the opposite erul-4 of^ the furnaceandaffording' a` surfacef on which the 'material to'be heated inthe furnace can rest-'for' the final' heating, means for blowing a combustible mixture into saidfurnaee ycern tra'llythereof-, and iues for exhaustingthe productsof combustion, connecting "with vthe interiory of 'said furnace at the ends thereof.

l0: lln-a furnace for heating, the combination' of? casing `lined with refractory materialya bottorninsaid casing, a turntable projecting throughsaid botto-mat' one end thereof, '-said"bottomextending` from said turn table'towardA the-opposite endl of the furnace'nnd affording a surface on which tlienlaterialzto be heated-in the furnace can rest' for the nal'l heating, means lfor blowingl a combustible mixture 'into said furnace centrally thereof, and' lines for Aexhausting the'products of combustion, connecting with the' `interiorv of'- said=furnace at the ends there- Y of, and; adjacent to 'the floor;

11. ln a furnace for heating, the vcombination of a furnace casing having: one ormore' openings inthe ends thereof for doors, said casinghaving openings inthe bottom thereofiand means for introducing acornbustible mixture' through saidopenings under pres sure to'cause it to blow upwardlvk aiongthe sides and against the roof of the furnace, saidcasing having exhaust openings at the ends thereof, saidopenings being at ornear the-floor of the furnace, the ventilation of the furnace for the purposes of combustion and-heating, being confined to the openings at or near the floor of the furnace.

/ 12. ln a furnace for heating, the combination of a furnace casing having one or more openings in the ends thereof for doors,said casing having openings in the bottom thereof, means for introducing a combustible mixture through said openings under pres sure to cause it to sides and against the roof of the furnace, said casing having exhaust openings at the ends thereof, said openings being at or near the floor 'of the furnacathe sides and roof of the casing being otherwise without open ings.

13. ln a furnace for heating, the combination of a furnace casing having one or more openings in the ends thereof for doors, said casing having openings in the bottom thereof and means for introducing a combustible mixture through said openings under pressure to cause it to blow upwardl along the sides and toward the roof of the furnace, said casing having exhaust openings at the ends thereof, said openings being at or near the floor of the furnace, one of the openings blow upwardly along 'the for the introduction of the combustible mix- .Y

ture hei'. g located` 1between two of the cxtom of seid furnace exteniiing for a consid nii:

of :i fornace easing having ioezf fchorein, openings in said fur-nece Casing, means 'for introducing i combustible mixturethrough said openings under pressure to @euse it. to be blown into the fornace, seid mixture burning:r inside of the furnace, iues for drawing off theproduetof combustion from the furnace, said :Hees opening into the iii.- terior oi? the furnace et the boioni of the furnace and being arranged in pairs on opposite sides of sn' furnace, and one oririere turn rubies arranged in the 'Hoor of the 'furnace between a pair o?" seid fines,

15, in a, furnace, the een'ibina easing lined with refractory mare mi, oors :it opposite ends thereof, zi turn table i1; the bottom of said easing euri means 'for continuously rotating Suid turn table, die ioottom of said furnace extenf'ing for e coneifiu erab'e disinnee from the turn fible.

le). in ai iurnnce, the combination of e easing iined with refractory materiel, (ioors at opposiie ends thereof, a turn iebie in fixe bottoni of Said casing and ineens 'for con iimonely iointing (i turn taille, the botH erabie disizince from the turn tabie, said furnaee .being iidzipied to ermit the progressive advancement eff izhe .smak hrongii zhe furnace from one door io the other.

i7. in e furnace for heating, rile combination oi" e ion. of a easing having one or more openings in the sides thereof. for doors, said ces,- ing'iizwing openings in the bottom thereof, means :for introducing a combustible mixture through said openings under vpressure to cause it i0 blow upwardi along the sides and toward the roof of ril/e furnace, said easing having exhaust openings at the ends thereof, said openings being et or neer the Hoor of the furnace, Ehev sides end roo of the ensiiw being otherwise wihout openings.

18. A furnace having a combustion chainber :idapied i receive the stock and heet the' sinne, seid. chamber having en imperio-` rate mp and :i boton'i perforated substantially midwifv of its iength on has opposite sides, ineens for introducing e, combustible mixure ihrough sairi perforetions under pressure to canse it io impinge the op of the furnace and to ignie against such top, said top being oi a materiel 'to reflectthe hem'. coward, the 'Hoor of the furnace, and eX- bensi, openings iii die lower part of the furnace siiiietantie-ily at its ends for the pr0dneige of annihilation.

1n testimony whereof i my signa-ture in presence of two Witnesses.

Gi/UF LEY L. SGHUETZ.

w iinesses:

ENA M. i, Lino ieu-mmm. 

